Calculate the theoretical yield of benzil assuming you begin with 2.72 grams of benzoin.

Answer : The correct answer for theoretical yield = 2.73 g

Theoretical yield : It is defined as maximum amount of yield that is expected to be produce from reactants . The theoretical yield is decided by amount of product formed by Limiting Reagent .

Theoretical yield can be calculated bu using stroichiometric relation between mole of limiting reactant and product .

The reaction of Benzil can be written as :

one mole of Benzoin produces one mole of Benzil ( Image ) .

Since only one reactant , Benzoin is present so limiting reactant can be considered as Benzoin .

Theoretical yield can be calculates in following steps :

Step 1 : Conversion of mass of Benzoin to its mole .

Mass can be converted to mole using following formula :

Molar mass of Benzoin (C₁₄H₁₂O₂ ) = 212.24

Plugging value of Mass and molar in mole formula :

Mole = 0.013 mol

Step 2 : To find mole ratio of Benzil to Benzoin .

Mole ratio can be find out from balanced reaction . From balanced reaction one mole of Benzoin giving one mole of Benzil , Hence mole ratio = 1 : 1

Step 3 : Find mole of Benzil

Mole of Benzil = 0.013 mol

Step 4 : To find mass of Benzil

Molar mass of Benzil (C₁₄H₁₀O₂ ) = 210.232

Plugging value in mole formula

Multiplying both side by 210.232

Mass of Benzil = 2.73 g

Hence Theoretical mass of Benzil = 2.73 g

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.